package com.common.platform.base.config.database;



import cn.hutool.core.collection.CollectionUtil;
import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.core.toolkit.PluginUtils;
import com.baomidou.mybatisplus.extension.toolkit.JdbcUtils;
import org.apache.ibatis.executor.statement.StatementHandler;
import org.apache.ibatis.mapping.BoundSql;
import org.apache.ibatis.mapping.MappedStatement;
import org.apache.ibatis.mapping.SqlCommandType;
import org.apache.ibatis.plugin.*;
import org.apache.ibatis.reflection.MetaObject;
import org.apache.ibatis.reflection.SystemMetaObject;

import java.sql.Connection;
import java.util.List;
import java.util.Map;
import java.util.Properties;

/**
 *
 */
@Intercepts({@Signature(type= StatementHandler.class,method = "prepare",args={Connection.class,Integer.class})})
public class DataScopeInterceptor implements Interceptor {

    @Override
    public Object intercept(Invocation invocation) throws Throwable {
        StatementHandler statementHandler= PluginUtils.realTarget(invocation.getTarget());
        MetaObject metaObject= SystemMetaObject.forObject(statementHandler);
        MappedStatement mappedStatement=(MappedStatement) metaObject.getValue ( "delegate.mappedStatement");
        if(!SqlCommandType.SELECT.equals(mappedStatement.getSqlCommandType())){
            return  invocation.proceed();
        }
        Connection connection=(Connection) invocation.getArgs()[0];
        DbType dbType= JdbcUtils.getDbType( connection.getMetaData().getURL());
        BoundSql boundSql=(BoundSql) metaObject.getValue("delegate.boundSql");
        String originalSql = boundSql.getSql();
        Object parameterObject=boundSql.getParameterObject();
        DataScope dataScope=findDataScopeObject(parameterObject);
        if(dataScope==null){
            return invocation.proceed();
        }
        String scopeName=dataScope.getScopName();
        List<Long> deptIds=dataScope.getDeptIdes();
        String join= CollectionUtil.join(deptIds,",");
        if(dbType!=null && dbType.equals((DbType.POSTGRE_SQL))) {
             originalSql = "select * from (" + originalSql + ") temp_data_scope where temp_data_scope.\"" + scopeName + "\"in(" + join + ")";
        }else {
            originalSql= "select * from (" + originalSql + ")temp_data_scope where_date_scope."+scopeName+"in(" +join+")";
        }
        metaObject.setValue("delegate.boundSql",originalSql);
        return  invocation.proceed();
    }


    public DataScope findDataScopeObject(Object parameterObj){
        if(parameterObj instanceof DataScope){
            return (DataScope)parameterObj;
        }
        if(parameterObj instanceof Map){
            for(Object val:((Map)parameterObj).values()){
               if(val instanceof DataScope){
                   return (DataScope) val;
               }
            }
        }
        return  null;
    }
    @Override
    public Object plugin(Object target) {
        return Plugin.wrap(target,this);
    }

    @Override
    public void setProperties(Properties properties) {

    }
}
